<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<style>
.box{
	width:100px;
	height:100px;
	margin:100px;
	background:Red; 
	box-shadow:0 0 30px 30px #000,inset 0 0 30px yellow;
}
</style>
</head>
<body>
<div class="box"></div>
</body>
</html>
